Materials Literature
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This work is concerning to production of quicklime (CaO) from thermal decomposition of the calcite limestone (CaCO3) using analytical and instrumental techniques (TGA and MS) to evaluate kinetic and thermodynamic effects as well as heat/mass transfer associates with the process operation. On the other hand, experiment…
The electrical transport and 1/ f conduction noise properties of LaFe 1− x Ni x O 3 ( x = 0.3, 0.4 and 0.5) thin films have been studied. The temperature dependent resistivity data have been fitted with Mott's variable-range hopping model. From the resistivity data we have estimated various parameters, namely, the hop…
Polyvinyl chloride (PVC) was chosen to be loaded with various amounts of high abrasion furnace black (HAF). The mechanical as well as electrical properties of the prepared composites were investigated. The dielectric properties of these composites were investigated in the frequency range 10 2 —10 5 Hz at a temperature…
In a recent paper [D. Torrent, A. Hakansson, F. Cervera, and J. S\'anchez-Dehesa, Phys. Rev. Lett. 96, 204302 (2006)] inspected the effective parameters of a cluster containing an ensemble of scatterers with a periodic or a weakly disordered arrangement. A small amount of disorder is shown to have a small influence on…
Polyhedral oligomeric silsesquioxanes epoxy resin (GM-POSS) was prepared from 3-glycidyloxypropyl-trimethoxysilane (GTMS) and methyl triethoxysilane (MTES) by hydrolytic condensation. GM-POSS was characterized using liquid chromatography/mass spectrometry (LC/MS). The epoxy value of GM-POSS is 0.23 mol/100 g. The LC/M…
BaTiO 3 (BTO), Pb(Zr 0.52 Ti 0.48 )O 3 (PZT), and Sr 1- x Ba x Nb 2 O 6 (SBN; x = 0.5, 0.4, and 0.25) nanocrystal-doped polycarbonate (PC) composite thin films were prepared by a spin-coating method. Ultrafine BTO and PZT nanocrystals of pure tetragonal perovskite phase were synthesized by a hydrothermal method, while…
Abstract Radical polymerizations from third to fifth generation macromonomers were conducted in supercritical carbon dioxide (scCO 2 ). It was found that all monomers were not soluble in such a medium, and reactions occurred in the CO 2 ‐swollen monomer matrices. Despite the expected severe diffusion limitations, very…
Gold nanoparticles are potentially very attractive components for therapeutic delivery since they can be synthesized with any diameter from 1 to 200 nm to carry a payload of therapeutic molecules into a cell without triggering an immune response. Gold nanoparticles must undergo surface transformations before coupling…
Pertinent physical properties of experimental particleboard specimens produced from date palm (Phoenix dactylifera-L) branch mid-ribs chips impregnated with ureaformaldehyde (UF) polymer binder are investigated. The effect of process variables (press temperature, pressure, press cycle time and particle thickness) on t…
Over the last decade, protein purification has become more efficient and standardized through the introduction of affinity tags. The choice and position of the tag, however, can directly influence the process of protein crystallization. Octopine dehydrogenase (OcDH) without a His tag and tagged protein constructs such…
Single-walled carbon nanotubes (SWCNTs) are noncovalently functionalised with octaethylporphyrins (OEPs) and the resulting nanohybrids are isolated from the free OEPs. Electron paramagnetic resonance (EPR) spectroscopy of cobalt(II)OEP, adsorbed on the nanotube walls by pi-pi-stacking, demonstrates that the CNTs act a…
NiO nanoparticles have been prepared in a room temperature ionic liquid, 1-butyl-3-methylimidazolium tetrafluoroborate (bmimBF4). The morphology and microstructures of the NiO nanoparticles were investigated by transmission electron microscopy (TEM) and x-ray diffraction (XRD). The TEM micrographs indicated that the n…
Substrate-free ZnO thin films have been obtained by metal organic chemical vapor deposition. Mild heating (37−51 °C) of the Zn(C 5 F 6 HO 2 ) 2 ·2H 2 O·CH 3 (OCH 2 CH 2 ) n OCH 3 ( n = 2, 3, 4) adduct precursors produced thermally stable liquid compounds that were easily evaporated. Rapid quenching to room temperature…
The first synthesis of a chelating and reactive surfactant derived from citric acid and a short silicone as hydrophobic tail is described. Aqueous solutions of this reactive amphiphile spontaneously induce gold ion reduction, particle nucleation, and further direct crystal growth. The process, both pH and light depend…
A simple three-state lattice model that incorporates two states for locally ordered and disordered forms of liquid water in addition to empty cells is introduced. The model is isomorphic to the Blume-Emery-Griffith model. The locally ordered (O) and disordered (D) forms of water are treated as two components, and we a…
Abstract Natural cellulose molecules have a strong tendency of being aggregated into larger structures. Thus, the imaging of isolated individual cellulose molecules is hampered for a long time. In this work, we manage to observe, for the first time, the isolated individual natural cellulose chains on a sample surface…
Ceramic/metal interfaces were studied that fail by atomistic separation accompanied by plastic dissipation in the metal. The macroscopic toughness of the specific Ni alloy/Al2O3 interface considered is typically on the order of ten times the atomistic work of separation in mode I and even higher if combinations of mod…
Patterned ZnO deposition on substrates has received increasing attention because of its great potential in photocatalysis, energy conversion, and electro-optical techniques. Chemical solution growth is especially promising for organic substrates due to its very mild reaction conditions. Here this method is used on fun…
We propose an efficient numerical scheme, based on the method of lines, for solving the Landau-de Gennes equations describing the relaxational dynamics of nematic liquid crystals. Our method is computationally easy to implement, balancing requirements of efficiency and accuracy. We benchmark our method through the stu…
We use group theory to classify the superconducting states of systems with two orbitals on a tetragonal lattice. The orbital part of the superconducting gap function can be either symmetric or antisymmetric. For the orbital symmetric state, the parity is even for spin singlet and odd for spin triplet; for the orbital…